C# Java class Animal { public void sound() { System.out.println("eek"); } 3 class Cow extends Animal { @Override public void sound() { System.out.println("moo"); } class Animal { public virtual void sound() { Console.WriteLine("eek"); } 3 class Cow: Animal public override void sound() { Console.WriteLine("moo"); 3 class Dog : Animal class Dog extends Animal class Maint public static void main(String[] args) { Animal a1=new Animal(); a 1.sound(); Cow a2=new Cowo); a2.sound(); Dog a3=new Dog(); a3.sound(); class MainClass { public static void Main (string[] args) { Animal a1=new Animal(); a 1.soundo: Cow a2=new Cow(); a2.sound Dog a3=new Dog(): a3.soundo: a3.sound() will produce a compile error. eek moo woof moo eek MGO eek mon eek